Improvement in apparatus for stirring and cooling lard



dialisi iaia esta offra.

' EDWARD F. RNG, OF'ST. LOUHIS,MISSOU.R I.

Letters Patent No. 109,548, datedNovember 22, 1870.

-IMPROVEMENT IN APPARATUS FOR AS'li'ylRl-'UNG AND COOLING LARD.

l.l'hn Schedulavreiured to ln thlle Letters Patent and making part of the lame.

1h 'all whomit may concern: l .v l

Be it known that I, EDWARD F. RING, of St.' Louis, in the county ot St. Louis and State ot' Missouri, have invented a new and improved Rotary Stili-er and Cooler; and I do hereby declare the following to be a' full, clear, and enactdescliption of the same, reference being had to the accompanying drawing making part of this specification, in which- Figure l is a top view.

Figure 2 representsa portion of the apparatus with' the wall broken away at :c x.

Figure 3 is a. cross-section of the stirrer-shaft.

The object of this invention is to provide for public use amachinebyvhich lard, oils, or other substance of similar character .may be cooled rapidly' and uniformly. -'lo this end The invention consists in a .stirring apparatus of 1 peculiarconstruction, and in the combination thereof with a jacketed vessel, having suitable inlets and outlets ,to the space between its double walls,^as herein- 'after more particularly described.

In the drawing- A is the inner andv B the outer wall of the vessel,l in which the lard, oil, or other substance is placed, 0

designating the space' between the walls.

c c, inlets thereto, by which said space may betilled with steam, cold water, 8vo.;

c, an outlet, by which .the condensed steam, water, Ste., may be drawn olf;

c, an overflow or waste-pipe; and a,a pipe, through which the liquid contentsot the vessel A may escape or bev removed, when necessary. D'i'sa shaft, bearing at d d, and capable ot being rotated byllneans of a crank, 'or pulley.

4.Arranged spirally on this shall; area series of projecting blades, E E, which, as the shaft is rotated,

, pass through the lard, keeping itin agitation so as to mirc it thoroughly while constantly-exposing a new surface, whereby'it is rapidly cooled. At the same time their spiral arrangement has the eect to move Athe body of the lard toward the lower or outlet end of the; vessel.

Eachblade E is of peculiar form, being designed to enter the lardv and leave it without splashing the liquidpand to push the mass along toward the outlet.,

This'result is accomplished by making the blades wide and thin,with sharp edges, and so bent thati their cross-section, asl seen in lig. 3, shows a straight line from e to e', and a curve or oblique line from e' to e".

such a position that'thestraight portion of theblade c e'lcuts directly into the iluid'i'disturbing the latter but slightly, andcausingno splashing whatever. The obliquepart e' e' follows, agtating the lar'd and pushing it along in `the vessel, as above referred to.

F F are braces connecting the blades, "and serving also, by their spiral position, to agitate the iuid andimpel it along.

'lh'ey form, it will be observed-,a con'-A tinuous line, so that no splashing is caused thereby.

, W'hen it is desired to melt lard or other similar substance, the space O may be' filled with hot. steam. When the vessel is employed as a cooler, cold water may beused instead of steam. Suitable cocks may,

of. course, be attached to the outlet and inlet pipes ,wherever desired.

I disclaim a revolving shuit provided with continuoils spiral flange, and used in connection'with a' jackcted vessel for'thissame purpose, knowing this to be old but' having thus described my invention,

lVhat I claim' as new, and desire to ,secure by Lettels Patent, is

l.' The blades E E, when constructed in the curved form shown at e el e2, and arranged in an inclined p0- sition spirally around the shaft D,'subs'taritia.lly as and for the purpose specified. y

2. The combination of the shaft D, provided with inclined blades E. E, constructed, as above'described, with the jacketed vessel A, substantially as 4and for the purpose set forth.

' ED. F. RING.

Witnesses:

Taos. D. D. Ouimm, (hns. A. Pnrrxr.

Thus constructed they are arranged on the shaft in d 

